JPS54108239A - Ensuring no earth of transmission line - Google Patents

Ensuring no earth of transmission line

Info

Publication number
JPS54108239A
JPS54108239A JP1573478A JP1573478A JPS54108239A JP S54108239 A JPS54108239 A JP S54108239A JP 1573478 A JP1573478 A JP 1573478A JP 1573478 A JP1573478 A JP 1573478A JP S54108239 A JPS54108239 A JP S54108239A
Authority
JP
Japan
Prior art keywords
earth connection
transmission line
earth
point
beat current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1573478A
Other languages
Japanese (ja)
Inventor
Koichi Oka
Koichi Sugiyama
Shoichi Shiga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP1573478A priority Critical patent/JPS54108239A/en
Publication of JPS54108239A publication Critical patent/JPS54108239A/en
Pending legal-status Critical Current

Links

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)
  • Electric Cable Installation (AREA)

Abstract

PURPOSE: To make a detection work with ease for a presence of earth connection between two points of the transmission line, by means of detecting a beat current of difference of the frequencies generated in the earth-connected wire.
CONSTITUTION: A-class earth connection E1, E2 is installed to a substation C, D at both ends of a transmission line W. An operational earth connection Ex is provided between construction sections A, B in the above transmission line. With a clamp- type inductive power source K1, K2 installed to A, B, an AC voltage V1, V2 of frequency f1, f2 is applied to the transmission line W, simultaneously with the outside of K1, K2 applied an earth connection of EA, EB. At this time, if removed the operational earth connection Ex, existent in the section of AB, after a completion of the construction, the voltages V1, V2 are cancelled by each other, with a beat current of f = f1, - f2 flowing in the earth connection EA at the point A. On the contrary, if existent still the earth connection point Ex, and V1 V2 earth are connected at that point not being overlapped to each other, thus with no beat current flowing.
COPYRIGHT: (C)1979,JPO&Japio
JP1573478A 1978-02-14 1978-02-14 Ensuring no earth of transmission line Pending JPS54108239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1573478A JPS54108239A (en) 1978-02-14 1978-02-14 Ensuring no earth of transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1573478A JPS54108239A (en) 1978-02-14 1978-02-14 Ensuring no earth of transmission line

Publications (1)

Publication Number Publication Date
JPS54108239A true JPS54108239A (en) 1979-08-24

Family

ID=11896987

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1573478A Pending JPS54108239A (en) 1978-02-14 1978-02-14 Ensuring no earth of transmission line

Country Status (1)

Country Link
JP (1) JPS54108239A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008283765A (en) * 2007-05-09 2008-11-20 Chugoku Electric Power Co Inc:The Device and system for detecting working ground wire, and working ground wire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008283765A (en) * 2007-05-09 2008-11-20 Chugoku Electric Power Co Inc:The Device and system for detecting working ground wire, and working ground wire

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